They might be horrible picks, but I'd totally see this movie:

Squall Leonhart - Homer Simpson
Rinoa Hartilly - Lindsay Lohan
Irvine Kinneas - Kelly Osbourne
Quistis Trepe - Lisa Kudrow
Zell Dincht - Jim Carrey
Selphie Tilmitt - a dog
Seifer Almasy - Ronan Keating
Fuujin and Raijin - Zac Efron & Tonya Harding (in that order)
Laguna Loire - Sandra Bullock
Edea Kramer - Paris Hilton
Cid Kramer - Sarah Palin
Kiros Seagul - Tyra Banks
Ward Zaback - Zangief
Ellone - John Travolta. Pretty hot in Hairspray.